Track Happy-Post and IMX France cross-border parcels through Pantin/Roissy sorting into La Poste Colissimo and Mondial Relay.

IMX Postal and its consumer/SMB brand Happy-Post consolidate French and international parcels at their Pantin (Paris metro) hub, routing domestic and cross-border shipments into La Poste Colissimo (`6A…` / `8R…`), Chronopost (`chronopost`), Mondial Relay (`mondialrelay`), and international postal networks.

Try a live tracking number:

Barcode transition: Happy-Post / IMX Postal to La Poste Colissimo / Mondial Relay

Domestic Happy-Post / IMX Postal parcels keep the same 92… / 420… barcode from pickup to mailbox. Pass ?carrier=laposte to inspect middle-mile sort scans before USPS induction.

Origin / middle-mile carrier
Happy-Post / IMX Postal (laposte)
Happy-Post / IMX ID or Colissimo 6A… / Mondial Relay 8-digit
^([68][A-Z]\d{11}|\d{8,14}|[A-Z]{2}\d{9}[A-Z]{2})$
Origin example
6A12345678901
Final-mile carrier
La Poste Colissimo / Mondial Relay (laposte)
La Poste Colissimo (6A… / 8R…) or Mondial Relay
^([68][A-Z]\d{11}|\d{8,12})$
Final-mile example
6A12345678901
Middle-mile resolution
Pris en charge par La Poste Colissimo / Mondial Relay

How the Happy-Post / IMX → Colissimo handoff works

Follow the parcel across both networks without waiting on asynchronous webhooks or losing visibility at the handoff boundary.

1. Drop-off at Relais or merchant pickup
The parcel is dropped off at a Pickup/Mondial Relay point or collected from the e-commerce warehouse.
2. IMX Pantin hub sort & carrier injection
IMX sorts the parcel at its Paris hub and injects it into La Poste Colissimo, Chronopost, or the destination country's postal service.
3. Final delivery by Colissimo or Relais collection
The final-mile carrier delivers the parcel and records proof of delivery.
La Poste Colissimo query
GET /v1/track/6A12345678901?carrier=laposte
Mondial Relay query
GET /v1/track/12345678?carrier=mondialrelay
Chronopost query
GET /v1/track/{number}?carrier=chronopost

Chain Happy-Post / IMX → Colissimo in code or MCP

Resolve both legs synchronously in TypeScript, curl, or your AI support agent via Streamable HTTP MCP.

REST (Synchronous GET)

# 1. Query Happy-Post / IMX Postal middle-mile scans on the 92… barcode:
curl "https://api.lastscanned.com/v1/track/6A12345678901?carrier=laposte" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

# 2. Query USPS final-mile scans on the same barcode:
curl "https://api.lastscanned.com/v1/track/6A12345678901" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

TypeScript (Automatic Handoff Chaining)

const headers = { Authorization: `Bearer ${process.env.LASTSCANNED_API_KEY}` };
const res = await fetch(`https://api.lastscanned.com/v1/track/${encodeURIComponent(number)}`, { headers });
let pkg = await res.json();

// If USPS is still waiting on the consolidator parcel, query Happy-Post / IMX Postal middle-mile hubs:
if (pkg.carrier === "usps" && pkg.status === "label_created" && /^(420\d{5})?9[2345]/.test(number)) {
  const mid = await fetch(`https://api.lastscanned.com/v1/track/${encodeURIComponent(number)}?carrier=laposte`, { headers });
  if (mid.ok) pkg = await mid.json();
}

Remote MCP (Claude Code / Cursor / ChatGPT)

claude mcp add --transport http lastscanned https://mcp.lastscanned.com \
  --header "Authorization: Bearer lsk_live_YOUR_API_KEY"

Happy-Post / IMX Cross-Border to La Poste Colissimo & Mondial Relay Handoff FAQ

Who is IMX on my French tracking page?
IMX France (the parent company of Happy-Post) is an independent postal and parcel consolidator based in Pantin near Paris that partners with La Poste, Mondial Relay, bpost, and USPS.
Can I track my Colissimo or Mondial Relay barcode directly on lastscanned?
Yes—pass ?carrier=laposte for Colissimo barcodes or ?carrier=mondialrelay for 8-digit Mondial Relay pins.

Other carrier handoff guides

Explore cross-border last-mile barcode extraction and domestic USPS consolidator overrides across all 273 carriers.

All 273 supported carriers

International posts and couriers

Cross-border